Cylindrical typewriter



D. JANKowER. CYLINDRICAL TYPEWRITER. APPLICATION FILED JAN.Z,1918. RENEWED MAR. 20, 1920.

1,341, 1 31 Patented May 25, 1920.

D. JANKOWEH. CYLINDRICAL TYPEWHITEH. APPLICATION FILED IAN. 2, IQIB. IIENEWED MAII.20, 1920.

Patented May 25, 1920.

2 SHEETS-SHEET 2.

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Fig@ 2 "UNITED STATE-s PATENT OFFICE'.

DAVID JANKOWER, OF NEW YORK, N. Y.

GYLINDRICAL TYPEWRITER.

To all whom t may concern.'

Be it known that I, DAVID JANKownR, a citizen of the United States, and resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Cylindrical Typewriters, of which the following isaJ specification.

The object of this invention is to provlde a nonkeyboard instrument simple in construction as well as in operation, and ada ted to produce the necessary results with the minimum amount of hand movement.

The basis of the invention is an elongated cylinder having cast on its periphery in multiple form, and in a longitudinal direction, to any extent desired, repetitions of the individual letters of the alphabet as well as other desired characters, so-that, according to the number of letters and spaces in a line of print there should be, approximately, a similar number, of a single letter of the alphabet, occupying a similar space lengthwise of the cylinder, the different series of letters following each other in regular rotation around the circumference of the said cylinder.

For instance, if there is a line of As running from left to right in a straight line from one end of the cylinder to the other, there will, immediately under the same, be a line of Bs each individual 13, being in downward line with one of the As above it. The other series of the letters of the alphabet will follow, in lines in their proper rotation around the periphery of the cylinder.

The cylinder is adapted to be rotated by hand so as to bring any particular line of letters to a stationary defined location where an impression of any single letter of the similar characters, in a single straight line, may be transferred to paper.

The combination of a cylinder, formed as explained above, with the parts to be further sliown and described, serves to produce an instrument -with a limited number of .i movable parts and simple in construction,

as will be more fully described and shown in the accompanying drawing, of which Figure 1, is a side elevation, partially in section, and Fig. 2, a transverse cross-section of the same. y

Similar numerals refer to similar parts throughout the different views.

In Fig. 1; the type-carrying cylinder is `inder 7; 10, cog wheel Specification of Letters Patent. Patented May 25, 1920 Renewed March 20, 1920. Serial No. 367,432.

indicated by numeral 1; 2, is the shaft to which the cylinder 1, is secured; 3, type characters cast on outer surface of cylinder l, and shown at cut-away section of guard cylinder 7; 4, base; 5, supports secured to base, and having openings in which shaft 2 revolves; 6, bar having teeth on top and T-shaped flange on bottom, the said bar being secured at each end to supports 5; 7, metal cylinder (rigidly secured to base 4, and right hand support 5), surrounding cylinder 1, but out of contact with the same; 8, elongated slot on upper part of cylinder 7; 9, left hand end of type cylinder 1, protruding through guard cylinder 7 and having visual letters corresponding to the series of letters in horizontal line on the said cylsecured to shaft 2, and adapted to revolve with type cylinder 1; l1, pressure spring connected to left hand support 5, and bearing against cog wheel 10; 12, handle for revolving shaft 2; 13, carrier arranged to slide along T flange on lower part of bar 6; 14 plunger, with button on top, passing through front tube of carrier 13, and arranged to make type impressions on the paper; 15, button, on plunger of back tube of carrier 13, slightly overlapped by button on plunger 14; 16, pawl pivoted at lower part of back plunger which is connected to button 15; 17, upper rubber rolls for forward movement of paper; 18, shaft on which rollers are secured; 19, handle for revolving shaft 18.

In Fig. 2; 1, is the type carrying cylinder; 2, shaft to which cylinder is secured; 3, type-characters cast on outer surface of cylinder 1; 4, base; 5, right hand support, for shaft, secured to base; 6, bar with teeth on top and T-shaped flange on bottom; 7, metal cylinder (rigidly secured to base 4, and right hand support 5) 13, carrier consisting of twin tubes and turned over edges that slide over T on bottom of bar 6; 14` plunger with button on top, passing through front tube of carrier 13; 15, button of plunger on back tube of carrier 13; 16, pawl,

pivoted to lower part of plunger 15; 17,

in side of plunger 15, so as to confine it to a take' place at right angles to each other, the

plunger carrier 13, moving lin one direction and the type-carrying cylinder 1 when rotated, moving at a right angle to the same. T he guard cylinder 7, serves the double purpose of protecting the face of the type on cylinder 1, and, by means of the paper resting on the edges of the elongated slot 8, keeps the same out of kcontact with the type, except when the plunger 14, is pressed downward when the paper is brought into contact with a single character.

While there are a large number of repeated characters on the type cylinder, the

cost of making same is small as they are all cast in a single piece. The method of operation is as follows:

After a sheet of paper, along with a sheet of carbon paper on top of same, (the carbon side in Contact with the paper) has been fed between rolls 17, and 20, by means of turning handle 19, at right hand end of shaft 18, the carrier 13, is slid along bar 6, to the desired position for starting printing.

`The handle 12, is then revolved until the letter to be printed shows under arrow `point over protruding part 9, of type cylinder 1, when plunger 14, of carrier 13, is

pressed downward and thev paper brought into contact with the character immediately under the plunger, impressing the same on the paper. When the next letter to be printed is brought into position, and the plunger 14, is again pressed downward, the first action that takes place is a movement from left to right, the distance of one tooth of the carrier 13, and the downward movement of the plunger being continued, the second character is impressed on the paper after the carrier has come to rest. After a complete word has been formed and a space has to be made between the same and the beginning of the following word, the plunger 15, is pressed down which serves to move the carrier the distance of one tooth, while the plunger 14, remains in its normal position out of contact with the paper. When a line, or part of a line, has been printed, the paper is moved forward by means of handle 19, into position for the following line.

The real operation of printing is Very simple, as the right hand is continuously in contact with the carrier 13, and the character to be printed is brought into position by the handle 12, which is continually held by the fingers of the left hand.

There are practically only two motions for the operator to think of; namely, the turning of the handle 12, and the pressing down of plunger 14, and, at timesplunger 15.

The pawl 16, pivoted to the lower part of plunger 15, assumes a partially horizontal position when the said plunger 15, is pressed downward, either singly or in combination with plunger 14, thereby automatically moving the carrier from left to right the distance of one tooth, which is the equivalent to the space occupied by a sin le type character. The spiralspring 23, shown in Fig. 2) serves to keep the pawl 16, out of contact with -the teeth on the T bar 6, while in its normal position. It, the said spring 23, also serves to keep printing plunger 14, out of contact with the paper while in its normal position, the button on top of plunger 15, throufgh being overlapped by the button on top o said plunger allowing of this arrangement.

lThe button on plunger 14, cannot be moved downward without carrying plunger 15, with it, but the latter which is large enough to give plenty of room for the finger, may be pressed downward \.while the plunger 14 remains, by means of a slight friction with its guides or by means of an extra spring, in its normal position.

The cog wheel 10, Fig. 1, has spaces corresponding to the longitudinal lines of similar type characters on cylinder 1, and in combination with pressure spring 11, serves to keep the type cylinder stationary while the printing is being done.

Having described my invent-ion, what I desire to claim is z- 1. In a typewriter, a revoluble cylinder, with means to revolve the same, the said cylinder having longitudinal lines of type characters extending around the surface thereof, each line of a similar sign, in combination with a printing mechanism carrier mounted to move along the surface of the cylinder in a direction parallel to the axis thereof, said carrier having two plungers for letter space movement of the carrier and for printing from said cylinder.

2. In a typewriter, a revoluble type-carrying cylinder having longitudinal lines of type characters around its periphery each line of a similar sign, a plunger mounted to move along the surface of said cylinder in a direction parallel to the axis and adapted to cause imprint of said characters upon a sheet of paper, and means for feeding the paper to present different lines thereof for printing.

Signed at New York city in the county of New York and State of New York this the 29th day of December A. D. 1917.

DAVID J ANKOWER.

Witnesses:

J. HART ROBERTSON, JOHN F. MoRoNEY. 

